Medicament dispensing device with a multimaterial diaphragm bounding a pneumatic force chamber
US7637260B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 2001 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | May 11, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/10
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A metered dose inhaler for use with a pressurized aerosol container which is preferably breath-actuated. A preload is applied to the internal aerosol valve by an amount sufficient to result in a dose release, but this is prevented by the application of a pneumatic resisting force. The inhaler comprises a release device which, upon actuation, releases the resisting force and allows the preload to actuate the aerosol valve. A metered dose of medicament is then released for inhalation by the patient. The pneumatic resisting force is established by a negative pressure region defined in part by a diaphragm. The diaphragm includes a central disk of a first, relatively high stiffness material and a peripheral ring, coupled by a flexure of a second, relatively low stiffness material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.